import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(VueRouter)

// const routes = [
//   { path: '/', redirect: '/login' },
//   { path: '/login', component: Login },
//   { path: '/home', component: Home }
// ]

// const router = new VueRouter({
//   routes
// })

const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: 'welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/users', component: Users }
      ]
    }
  ]
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  //from 代表从哪啊个路径跳转而来
  //next是一个函数，标识方形
  //next() 放行 next('/login')  强制跳转
  if (to.path === '/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) {
    return next('/login')
  }
  next()
})

export default router
